Rucksack



FIG. 1 is a front perspective view showing our new design for a rucksack,

FIG. 2 is a front view thereof,

FIG. 3 is a left side view thereof,

FIG. 4 is a right side view thereof,

FIG. 5 is a rear view thereof,

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The cross-hatched lines shown in the drawings represent a textured, fabric surface.

The dashed broken lines shown in the drawing views represent stitching lines.

The vertical shade lines shown on the sidewalls in the drawing views represents a second type of textured surface detail.

The stippled line shading represents a third typed of textured surface. 

The ornamental design for a rucksack, as shown and described. 